Anaerobic biogas slurry treatment system based on ultrasonic technology

Abstract

The anaerobic biogas slurry treatment system based on the ultrasonic technology comprises an ultrasonic treatment tank, a temporary storage tank, a PAC dosing device, a flocculant dosing device and a pipeline mixer, the ultrasonic treatment tank receives biogas slurry output by an anaerobic system and is connected with the temporary storage tank through a conveying pump, the temporary storage tank is communicated with the pipeline mixer through a discharging pump, and the pipeline mixer is communicated with the PAC dosing device through a discharging pump. The PAC dosing device and the flocculant dosing device are respectively connected with the output end of the discharge pump, and the output end of the pipeline mixer is externally connected with a centrifugal dehydrator. The anaerobic biogas slurry treatment system based on the ultrasonic technology disclosed by the utility model is arranged at the front end of centrifugal dewatering, and microbial cell structures in the biogas slurry are destroyed by utilizing the ultrasonic technology, so that moisture in microbial cells is easier to remove, and the dewatering effect of the centrifugal dewatering machine can be greatly improved, so that the moisture content of biogas residues dewatered by the centrifugal dewatering machine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of anaerobic biogas slurry treatment, and more specifically, to an anaerobic biogas slurry treatment system based on ultrasonic technology. Background Art

[0002] At present, anaerobic fermentation accounts for more than 80% of the treatment processes for organic waste such as kitchen waste. Anaerobic fermentation is a mainstream treatment process for organic waste. The production of biogas clean energy during anaerobic fermentation plays an important role in reducing carbon emissions in the solid waste field. However, the biogas slurry after anaerobic dehydration of organic waste has problems such as high water content and high cost of adding chemicals during the dehydration process. The anaerobic biogas residue sent to the subsequent incineration plant will also be subject to various restrictions due to its high water content and low calorific value. How to reduce the water content of the biogas residue after anaerobic dehydration and better realize the coordinated treatment of organic waste projects and incineration plants is a problem that needs to be solved urgently.

[0003] Studies have found that the biogas slurry after anaerobic fermentation of organic waste is rich in organic matter, humic acid, trace nutrients, multiple amino acids, enzymes and microorganisms. There are many ways to dehydrate anaerobic biogas slurry, such as high-pressure plate and frame dehydration and centrifugal dehydration. High-pressure plate and frame dehydration has problems such as large investment, cumbersome operation, and large amount of lime added. Anaerobic biogas slurry dehydration mostly adopts centrifugal dehydration. However, centrifugal dehydration can generally only dehydrate the biogas slurry to a water content of about 80%. The high water content cannot meet the requirements of landfills. Due to the high water content and low calorific value, incineration will also be subject to certain limits. Utility Model Content

[0004] The utility model provides an anaerobic biogas slurry treatment system based on ultrasonic technology to solve the technical problem that the water content of biogas residue after dehydration is still as high as about 80% in the existing biogas slurry centrifugal dehydration technology, so as to reduce the water content of biogas residue after centrifugal dehydration.

[0005] According to one aspect of the utility model, there is provided an anaerobic biogas slurry treatment system based on ultrasonic technology, comprising an ultrasonic treatment tank, a temporary storage tank, a PAC dosing device, a flocculant dosing device and a pipeline mixer, wherein the ultrasonic treatment tank receives the biogas slurry output by the anaerobic system and is connected to the temporary storage tank via a delivery pump, the temporary storage tank is connected to the pipeline mixer via a discharge pump, and the PAC dosing device and the flocculant dosing device are respectively connected to the output end of the discharge pump.

[0006] Preferably, based on the above scheme, the ultrasonic treatment tank includes a tank body, an ultrasonic generator, an ultrasonic converter and a conduction shaft, wherein the ultrasonic generator is installed on the top of the tank body, one end of the conduction shaft is connected to the ultrasonic generator through the ultrasonic converter, and the other end thereof extends to the bottom of the tank body.

[0007] Preferably, based on the above solution, an electric stirring rod is installed in the temporary storage tank.

[0008] Preferably, based on the above solution, a liquid level gauge is provided in the tank body.

[0009] Preferably, based on the above scheme, the discharge port of the delivery pump is provided with a reflux branch, and the reflux branch is used to realize the reflux of the sludge to the ultrasonic treatment tank.

[0010] Preferably, based on the above solution, the output end of the pipeline mixer is externally connected to a centrifugal dehydrator.

[0011] Compared with traditional anaerobic biogas treatment methods, it has the following advantages:

[0012] 1. The anaerobic biogas slurry treatment system based on ultrasonic technology of the utility model is arranged at the front end of centrifugal dehydration, and uses ultrasonic technology to destroy the microbial cell structure in the biogas slurry, so that the water in the microbial cells is easier to escape, which can greatly improve the dehydration effect of the centrifugal dehydrator and reduce the moisture content of the biogas residue after dehydration by the centrifugal dehydrator;

[0013] 2. The anaerobic biogas slurry treated with ultrasonic technology is then subjected to centrifugal dehydration treatment. The moisture content of the biogas residue after dehydration is lower, and the calorific value is correspondingly increased, making the biogas residue easier to coordinate with the incineration plant.

[0014] 3. Due to the use of ultrasonic technology, not only can the microbial cell structure in the biogas slurry be destroyed, but also the biogas slurry can be made more uniform, and the mixed liquid of the reagents can be made more delicate and uniform. Under the same effect, the dosage can be greatly reduced, and the cost of dehydration and dosing can be lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 This is a structural principle diagram of the anaerobic biogas slurry treatment system based on ultrasonic technology of the utility model;

[0017] Figure 2 This is a structural diagram of the ultrasonic treatment tank of the utility model;

[0018] Description of Figure Numbers:

[0019] Ultrasonic treatment tank 1, tank body 11, conduction shaft 12, ultrasonic generator 13, ultrasonic converter 14, delivery pump 2, temporary storage tank 3, discharge pump 4, PAC dosing device 5, flocculant dosing device 6, pipeline mixer 7. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0022] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0023] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0024] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0025] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0027] See also Figure 1, and combined with Figure 2 As shown, the utility model is an anaerobic biogas slurry treatment system based on ultrasonic technology, comprising an ultrasonic treatment tank 1, a temporary storage tank 3, a PAC dosing device 5, a flocculant dosing device 6 and a pipeline mixer 7. The ultrasonic treatment tank 1 receives the biogas slurry output by the anaerobic system and is connected to the temporary storage tank 3 through a delivery pump 2. The temporary storage tank 3 is connected to the pipeline mixer 7 through a discharge pump 4. The PAC dosing device 5 and the flocculant dosing device 6 are respectively connected to the output end of the discharge pump 4, and the output end of the pipeline mixer is externally connected to a centrifugal dehydrator.

[0028] Among them, the ultrasonic treatment tank 1 includes a tank body 11, an ultrasonic generator 13, an ultrasonic converter 14 and a conduction shaft 12. The ultrasonic generator 13 is installed on the top of the tank body 11. One end of the conduction shaft 12 is connected to the ultrasonic generator 13 through the ultrasonic converter 14, and the other end thereof extends to the bottom of the tank body 11.

[0029] The biogas slurry transported from the anaerobic system outlet tank is sent to the ultrasonic treatment tank 1, and the ultrasonic generator 13 placed on the top of the tank body 11 generates ultrasonic waves of a specific frequency, which are converted into mechanical energy through the ultrasonic converter 14 and transmitted to the conduction shaft 12 in the tank body 11 to transmit the mechanical energy to the biogas slurry, thereby destroying the microbial cell structure in the biogas slurry and making it easier for the water in the microbial cells to escape.

[0030] After the biogas slurry is subjected to ultrasonic crushing treatment, the treated biogas slurry is transported to the temporary storage tank 3 through the delivery pump 2. The volume of the temporary storage tank 3 matches the processing capacity of the rear-end centrifugal dehydrator. An electric stirring rod is arranged in the biogas slurry temporary storage tank 3 to ensure the uniformity of the material.

[0031] The biogas slurry discharge pump 4 transports the biogas slurry in the temporary storage tank 3 to the rear end through a pipeline. The flocculant dosing device 6 and the PAC dosing device 5 transport the agents to the biogas slurry transport pipeline through their respective configured dosing pumps. The agents and the biogas slurry are fully mixed by the pipeline mixer 7 placed on the pipeline and then transported to the centrifugal dehydration equipment at the rear end.

[0032] It should be noted that a liquid level meter is provided in the tank body 11 of the utility model to measure the amount of biogas slurry in the tank body 11 and adjust its working rhythm.

[0033] Furthermore, a reflux branch is provided at the discharge port of the delivery pump 2 , and the reflux branch is used to enable the sludge to reflux to the ultrasonic treatment tank 1 .

[0034] Compared with traditional anaerobic biogas treatment methods, it has the following advantages:

[0035] The anaerobic biogas slurry treatment system based on ultrasonic technology of the utility model is arranged at the front end of centrifugal dehydration, and utilizes ultrasonic technology to destroy the microbial cell structure in the biogas slurry, so that the water in the microbial cells can be more easily removed, which can greatly improve the dehydration effect of the centrifugal dehydrator and reduce the water content of the biogas residue after dehydration by the centrifugal dehydrator;

[0036] The anaerobic biogas slurry treated with ultrasonic technology is then subjected to centrifugal dehydration treatment. The dehydrated biogas residue has a lower moisture content and a correspondingly higher calorific value, making it easier to coordinate treatment with the incineration plant.

[0037] Due to the use of ultrasonic technology, not only can the microbial cell structure in the biogas slurry be destroyed, but also the biogas slurry can be made more uniform, and the mixed liquid of the reagents can be made more delicate and uniform. Under the same effect, the dosage can be greatly reduced, and the cost of dehydration and dosing can be lower.

[0038] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An anaerobic biogas slurry treatment system based on ultrasonic technology, characterized in that: It includes an ultrasonic treatment tank, a temporary storage tank, a PAC dosing device, a flocculant dosing device and a pipeline mixer. The ultrasonic treatment tank receives the biogas slurry output by the anaerobic system and is connected to the temporary storage tank through a delivery pump. The temporary storage tank is connected to the pipeline mixer through a discharge pump. The PAC dosing device and the flocculant dosing device are respectively connected to the output end of the discharge pump.

2. The anaerobic biogas slurry treatment system based on ultrasonic technology according to claim 1, characterized in that: The ultrasonic treatment tank comprises a tank body, an ultrasonic generator, an ultrasonic converter and a conduction shaft. The ultrasonic generator is mounted on the top of the tank body. One end of the conduction shaft is connected to the ultrasonic generator through the ultrasonic converter, and the other end thereof extends to the bottom of the tank body.

3. The anaerobic biogas slurry treatment system based on ultrasonic technology according to claim 1, characterized in that: An electric stirring rod is arranged in the temporary storage tank.

4. The anaerobic biogas slurry treatment system based on ultrasonic technology according to claim 1, characterized in that: A liquid level gauge is arranged in the temporary storage tank.

5. The anaerobic biogas slurry treatment system based on ultrasonic technology according to claim 1, characterized in that: The discharge port of the delivery pump is provided with a reflux branch, and the reflux branch is used to realize the reflux of the biogas residue to the ultrasonic treatment tank.

6. The anaerobic biogas slurry treatment system based on ultrasonic technology according to claim 1, characterized in that: The output end of the pipeline mixer is externally connected to a centrifugal dehydrator.

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